4819909 has 2 divisors, whose sum is σ = 4819910. Its totient is φ = 4819908.

The previous prime is 4819889. The next prime is 4819937. The reversal of 4819909 is 9099184.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4397409 + 422500 = 2097^2 + 650^2 .

It is a cyclic number.

It is not a de Polignac number, because 4819909 - 2¹³ = 4811717 is a prime.

4819909 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4819609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2409954 + 2409955.

It is an arithmetic number, because the mean of its divisors is an integer number (2409955).

Almost surely, 2^4819909 is an apocalyptic number.

It is an amenable number.

4819909 is a deficient number, since it is larger than the sum of its proper divisors (1).

4819909 is an equidigital number, since it uses as much as digits as its factorization.

4819909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 4819909 is about 2195.4291152301. The cubic root of 4819909 is about 168.9194322036.

Subtracting 4819909 from its reverse (9099184), we obtain a triangular number (4279275 = T₂₉₂₅).

The spelling of 4819909 in words is "four million, eight hundred nineteen thousand, nine hundred nine".